mariner 25hp

[d1ve1n]

Hi
i hope you can help my 25 hp Mariner 2 stroke short shaft engine (about 7 years old)
does not have a data plate on (may have fallen off )
the serial number is OP107803

could you advise me what the spark plug gap should be

many thanks in advance

[yam man]

1mm /045'off the top of my head

[Locozodiac]

1.0 mm or 0.40" use shim much preferably, shim must be held tight against tip.

Happy Boating